<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport"
    content="width=device-width, initial-scale=1, maximum-scale=1,minimum-scale=1, user-scalable=no" />
  <title>闭包的使用</title>
  <link rel="shortcut icon" href="../favicon.ico" type="image/x-icon" />
  <link rel="stylesheet" href="./css/demo1.css" />
</head>

<body>
  <div class="box">
    <div>
      <div class="num">1</div>
      <button class="btn">点击++</button>
    </div>
    <div>
      <div class="num">1</div>
      <button class="btn">点击++</button>
    </div>
    <div>
      <div class="num">1</div>
      <button class="btn">点击++</button>
    </div>
    <ul>
      <li>vue</li>
      <li>angular</li>
      <li>react</li>
      <li>typescript</li>
      <li>pyhon</li>
      <li>java</li>
      <li>javaScript</li>
    </ul>
  </div>
  <script src="./js/demo1.js"></script>
</body>

</html>